*/
struct fcp_cmnd cdb_cmd;
size_t xfer_len;
+ u16 xfer_ddp; /* this xfer is ddped */
u32 xfer_contig_end; /* offset of end of contiguous xfer */
u16 max_payload; /* max payload size in bytes */
u8 recov_retry; /* count of recovery retries */
struct fc_seq *recov_seq; /* sequence for REC or SRR */
};
+/*
+ * FC_FCP HELPER FUNCTIONS
+ *****************************/
+static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
+{
+ if (fsp && fsp->cmd)
+ return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
+ return false;
+}
/*
* Structure and function definitions for managing Fibre Channel Exchanges
struct libfc_function_template {
- /**
- * Mandatory Fields
- *
- * These handlers must be implemented by the LLD.
- */
-
/*
* Interface to send a FC frame
- */
- int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
-
- /**
- * Optional Fields
*
- * The LLD may choose to implement any of the following handlers.
- * If LLD doesn't specify hander and leaves its pointer NULL then
- * the default libfc function will be used for that handler.
- */
-
- /**
- * ELS/CT interfaces
+ * STATUS: REQUIRED
*/
+ int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
/*
- * elsct_send - sends ELS/CT frame
+ * Interface to send ELS/CT frames
+ *
+ * STATUS: OPTIONAL
*/
struct fc_seq *(*elsct_send)(struct fc_lport *lport,
struct fc_rport *rport,
struct fc_frame *fp,
void *arg),
void *arg, u32 timer_msec);
- /**
- * Exhance Manager interfaces
- */
/*
* Send the FC frame payload using a new exchange and sequence.
* timer_msec argument is specified. The timer is canceled when
* it fires or when the exchange is done. The exchange timeout handler
* is registered by EM layer.
+ *
+ * STATUS: OPTIONAL
*/
struct fc_seq *(*exch_seq_send)(struct fc_lport *lp,
struct fc_frame *fp,
void *arg, unsigned int timer_msec);
/*
- * send a frame using existing sequence and exchange.
+ * Sets up the DDP context for a given exchange id on the given
+ * scatterlist if LLD supports DDP for large receive.
+ *
+ * STATUS: OPTIONAL
+ */
+ int (*ddp_setup)(struct fc_lport *lp, u16 xid,
+ struct scatterlist *sgl, unsigned int sgc);
+ /*
+ * Completes the DDP transfer and returns the length of data DDPed
+ * for the given exchange id.
+ *
+ * STATUS: OPTIONAL
+ */
+ int (*ddp_done)(struct fc_lport *lp, u16 xid);
+ /*
+ * Send a frame using an existing sequence and exchange.
+ *
+ * STATUS: OPTIONAL
*/
int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp,
struct fc_frame *fp);
/*
- * Send ELS response using mainly infomation
- * in exchange and sequence in EM layer.
+ * Send an ELS response using infomation from a previous
+ * exchange and sequence.
+ *
+ * STATUS: OPTIONAL
*/
void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd,
struct fc_seq_els_data *els_data);
* A timer_msec can be specified for abort timeout, if non-zero
* timer_msec value is specified then exchange resp handler
* will be called with timeout error if no response to abort.
+ *
+ * STATUS: OPTIONAL
*/
int (*seq_exch_abort)(const struct fc_seq *req_sp,
unsigned int timer_msec);
/*
* Indicate that an exchange/sequence tuple is complete and the memory
* allocated for the related objects may be freed.
+ *
+ * STATUS: OPTIONAL
*/
void (*exch_done)(struct fc_seq *sp);
* Assigns a EM and a free XID for an new exchange and then
* allocates a new exchange and sequence pair.
* The fp can be used to determine free XID.
+ *
+ * STATUS: OPTIONAL
*/
struct fc_exch *(*exch_get)(struct fc_lport *lp, struct fc_frame *fp);
* Release previously assigned XID by exch_get API.
* The LLD may implement this if XID is assigned by LLD
* in exch_get().
+ *
+ * STATUS: OPTIONAL
*/
void (*exch_put)(struct fc_lport *lp, struct fc_exch_mgr *mp,
u16 ex_id);
/*
* Start a new sequence on the same exchange/sequence tuple.
+ *
+ * STATUS: OPTIONAL
*/
struct fc_seq *(*seq_start_next)(struct fc_seq *sp);
* Reset an exchange manager, completing all sequences and exchanges.
* If s_id is non-zero, reset only exchanges originating from that FID.
* If d_id is non-zero, reset only exchanges sending to that FID.
+ *
+ * STATUS: OPTIONAL
*/
void (*exch_mgr_reset)(struct fc_lport *,
u32 s_id, u32 d_id);
- void (*rport_flush_queue)(void);
- /**
- * Local Port interfaces
+ /*
+ * Flush the rport work queue. Generally used before shutdown.
+ *
+ * STATUS: OPTIONAL
*/
+ void (*rport_flush_queue)(void);
/*
- * Receive a frame to a local port.
+ * Receive a frame for a local port.
+ *
+ * STATUS: OPTIONAL
*/
void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp,
struct fc_frame *fp);
+ /*
+ * Reset the local port.
+ *
+ * STATUS: OPTIONAL
+ */
int (*lport_reset)(struct fc_lport *);
- /**
- * Remote Port interfaces
+ /*
+ * Create a remote port
*/
+ struct fc_rport *(*rport_create)(struct fc_disc_port *);
/*
* Initiates the RP state machine. It is called from the LP module.
* - PLOGI
* - PRLI
* - RTV
+ *
+ * STATUS: OPTIONAL
*/
int (*rport_login)(struct fc_rport *rport);
/*
* Logoff, and remove the rport from the transport if
* it had been added. This will send a LOGO to the target.
+ *
+ * STATUS: OPTIONAL
*/
int (*rport_logoff)(struct fc_rport *rport);
/*
* Recieve a request from a remote port.
+ *
+ * STATUS: OPTIONAL
*/
void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
struct fc_rport *);
- struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
-
- /**
- * FCP interfaces
+ /*
+ * lookup an rport by it's port ID.
+ *
+ * STATUS: OPTIONAL
*/
+ struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
/*
* Send a fcp cmd from fsp pkt.
*
* The resp handler is called when FCP_RSP received.
*
+ * STATUS: OPTIONAL
*/
int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
void (*resp)(struct fc_seq *, struct fc_frame *fp,
void *arg));
/*
- * Used at least durring linkdown and reset
+ * Cleanup the FCP layer, used durring link down and reset
+ *
+ * STATUS: OPTIONAL
*/
void (*fcp_cleanup)(struct fc_lport *lp);
/*
* Abort all I/O on a local port
+ *
+ * STATUS: OPTIONAL
*/
void (*fcp_abort_io)(struct fc_lport *lp);
- /**
- * Discovery interfaces
+ /*
+ * Receive a request for the discovery layer.
+ *
+ * STATUS: OPTIONAL
*/
-
void (*disc_recv_req)(struct fc_seq *,
struct fc_frame *, struct fc_lport *);
/*
* Start discovery for a local port.
+ *
+ * STATUS: OPTIONAL
*/
void (*disc_start)(void (*disc_callback)(struct fc_lport *,
enum fc_disc_event),
/*
* Stop discovery for a given lport. This will remove
* all discovered rports
+ *
+ * STATUS: OPTIONAL
*/
void (*disc_stop) (struct fc_lport *);
* Stop discovery for a given lport. This will block
* until all discovered rports are deleted from the
* FC transport class
+ *
+ * STATUS: OPTIONAL
*/
void (*disc_stop_final) (struct fc_lport *);
};
u16 link_speed;
u16 link_supported_speeds;
u16 lro_xid; /* max xid for fcoe lro */
+ unsigned int lso_max; /* max large send size */
struct fc_ns_fts fcts; /* FC-4 type masks */
struct fc_els_rnid_gen rnid_gen; /* RNID information */
struct delayed_work disc_work;
};
-/**
+/*
* FC_LPORT HELPER FUNCTIONS
*****************************/
static inline void *lport_priv(const struct fc_lport *lp)
}
-/**
+/*
* LOCAL PORT LAYER
*****************************/
int fc_lport_init(struct fc_lport *lp);
int fc_set_mfs(struct fc_lport *lp, u32 mfs);
-/**
+/*
* REMOTE PORT LAYER
*****************************/
int fc_rport_init(struct fc_lport *lp);
void fc_rport_terminate_io(struct fc_rport *rp);
-/**
+/*
* DISCOVERY LAYER
*****************************/
int fc_disc_init(struct fc_lport *lp);
-/**
+/*
* SCSI LAYER
*****************************/
/*
*/
void fc_fcp_destroy(struct fc_lport *);
-/**
+/*
+ * Set up direct-data placement for this I/O request
+ */
+void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
+
+/*
* ELS/CT interface
*****************************/
/*
int fc_elsct_init(struct fc_lport *lp);
-/**
+/*
* EXCHANGE MANAGER LAYER
*****************************/
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff